Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a505f4baa0f010…

MALICIOUS

PDF

52.9 KB Created: 2020-11-04 14:30:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3cdfab13e914e4bee8651d2af6ad1eae SHA-1: e1dc47ecd17822268b57323db4381b5a3f70dfe5 SHA-256: d9a505f4baa0f010c461f73e0718ca5e84e4bf6cc93edabf2f658682e173ddeb
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, https://gettraff.ru/123?keyword=quikrete+pool+filter+sand+reviews, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is sufficient to classify this as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/123?keyword=quikrete+pool+filter+sand+reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f8dd067c635a.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/sepixanajevub.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/11604dc7532d10.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/topopigalola-gopokewufela-vegavugide-newivox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b654c0aa-1fb3-4e51-bf8b-78e624c2ee6f/1603995954.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf572f3-bdd4-49ff-8543-234266cbf11b/jumogidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3384496f-1d46-41e9-9d7b-028930ffb114/16472457709.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdfff489-d1b7-4c97-8ae8-589d9fff61d8/ps3_eye_camera_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b2d81f-034f-44a3-83ff-cafdb604d1cc/21131173272.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/faputejobatom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55f7046-dcf3-4628-8c57-f928f05dfb94/penesodupanagijimimugozex.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000081f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81F0 5192 bytes
SHA-256: ed8e4ac9e70e75880c98ca60975be8851359b705d60c5a74e219926a66a9a5c3
font_01_sfnt_off000093b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93B6 10948 bytes
SHA-256: 99d60c68db254e742b4229580a3f6aaed5632030204a0a8b63d50265cf211fcc
font_02_sfnt_off0000b8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BC 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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